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alternatives for ammonium thiosulfate?
On Monday, July 9, 2001 5:45:19 AM UTC-4, Klaus Schmaranz wrote:
Hi, Ammonium thiosulfate is quite difficult to get (and expensive!) because it's quite unstable... sofar, so good... Is there any alternative to be used for a fixer that will be capable of fully fixing modern emulsions (such as rapid fixer)? Sodium thiosulfate doesn't do a perfect job on them, at least not if they contain silver-iodide. BTW - is there any source where I can find out which films and papers need ammonium thiosulfate because of the iodide, and which don't? Thanks, Klaus. There is a tiny but growing sub-culture alternative to ammonium thiosulfate as a fixer, not spoken of in polite erudite professional spaces. Everybody knows this elephant in the room is as brown as Cafenol-C. Pardon my vulgarity, but iodized Sea Salt or Portuguese Kitchen Salt (NOT TABLE and NOT REFINED) plus distilled water supersaturated and filtered at 1.2 kg/litre density at 25-40 degrees C for 4 to 18 hours has been used with some degree of success. An odd thing is that a particular seaweed called "Dulse", rich in potassium iodide, may be added to the soup for an extra special secret "kick". Of course that's off the main highway off some back road of electronic information, face down in a ditch with a tinfoil hat kind of stuff. Not exactly something you would use for a Presidential inauguration or anything other than art. You didn't here it from me! Keep it on the D-L! |
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